Synthesis, Characterization and Analytical Study of New Azo Compounds for using Acid-base Indicators

Authors

  • Abdullah Hussein Kshash University of Anbar Author
  • Ahmed Dhary Saleh University of Anbar Author
  • Hussain Saleem Jabbar University of Anbar Author

DOI:

https://doi.org/10.69923/qyzdz362

Keywords:

New Azo Compounds for using as acid-base indictors

Abstract

A diazotization method was used to synthesize new azo compounds, to which phenol was subsequently added to diazonium salt solution in the basic medium at temperatures ranging from 0 to 5 °C and compounds were characterized by FT-IR, 1H-NMR, and 13C-NMR spectroscopy. The potential of the compounds as acid-base indicators was tested by determining their ionization and protonation constants at different pH levels (1 to 14) using a DMSO solution of the synthesized compounds. UV-Vis spectra show a maximum wavelength (380-390 nm) observed at pH 1-7, indicating the cationic formula (a protonated form of compound H2 and H4), another peak (470-530 nm) appears at pH 8-13, indicating the ionic formula (a deprotonated form of compound H2 and H4), and compound H5 is observed at 560 nm at pH 1-7. Another peak appears at 505 nm at pH 8–13, attributable to absorption of the ionic formula (deprotonated form of compound H5). Molecules H2, H4, and H5 showed distinct colour changes when shifted to acidic and basic conditions. Furthermore, these compounds showed exceptional accuracy in drawing conclusions about the phenomenon.

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Author Biographies

  • Abdullah Hussein Kshash, University of Anbar

     Dr. Abdullah Hussein Kshash is an professor at the College of Education for Pure Sciences at the University of Anbar. He obtained a bachelor’s and master’s degree in chemistry from University of Anbar  He obtained a doctorate from the Tikrit University . He can be contacted at email : drabdullah@uoanbar.edu.iq or drabdullahkshash@gmail.com

  • Ahmed Dhary Saleh, University of Anbar

    Dr. Ahmed Dhary Saleh is an associate professor at the College of Education for Pure Sciences at the University of Anbar. He obtained a bachelor’s degree in chemistry from the University of Anbar and a master’s degree from the University of Baghdad, College of Sciences. He obtained a doctorate from Bangor University in the UK. He can be contacted at email: eps.ahmeddhari.saleh@uoanbar.edu.iq

  • Hussain Saleem Jabbar, University of Anbar

    Hussain Saleem Jabbar is a Master's student at the College of Education for Pure Sciences at the University of Anbar. He obtained a bachelor’s degree in chemistry from the College of Education for Pure Sciences (Ibn Al-Haitham) at the University of Baghdad. 2020. He can be contacted at: hus22u4001@uoanbar.edu.iq

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Published

09/30/2024

Issue

Vol. 1 No. 2 (2024)

Section

Articles

License

Copyright (c) 2024 Iraqi Journal for Applied Sciences

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References

Marshall,G.C.and H.W.Ohm 1987 .Yield responses of 16 winter wheat cultivars to row spacing and seeding rate .Agronomy Journal .79:1027-1030

How to Cite

[1]
“Synthesis, Characterization and Analytical Study of New Azo Compounds for using Acid-base Indicators”, IJApSc, vol. 1, no. 2, pp. 77–85, Sep. 2024, doi: 10.69923/qyzdz362.

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